光学精密工程2018，Vol.26Issue(3)：597-605,9.DOI:10.3788/OPE.20182603.0597
磁悬浮控制力矩陀螺锁紧机构可靠性设计及优化
Reliability design and structural optimization of locking device for magnetic suspension control moment gyro
摘要
Abstract
To avoid the negative effects of structural parameters' randomness on its properties,an optimization method of locking elastic sheet based on reliability sensitivity was proposed.Firstly,the finite element model and failure modes of the locking elastic sheet for a magnetic suspension control moment gyro were analyzed.Afterwards,considering the randomness of the structural sizes and material parameters of the elastic sheet,the reliability of the elastic sheet in the series failure mode were studied by using the response surface method and the first order second moment method.Furthermore,the calculating formulas of reliability sensitivity with respect to the mean and variance of random variables were derived.Eventually,the model of elastic sheet reliability optimization was built with the optimization strategy determined by the result of reliability sensitivity analysis.The difference influence of safety factor optimization and reliability optimization was analyzed.Experimental results indicate that the reliability optimization could get better optimization results compared with the safety factor optimization.The reliability sensitivity optimization method not only reduces the weight of the elastic sheet by 23.71％ under the premise of ensuring the high reliability of the elastic sheet,but also reduces the weight of gyro room by 0.98 kg,which is beneficial to weight reduction of the magnetic suspension control moment gyro.关键词
力矩蛇螺/锁紧机构/响应面/一次二阶矩/可靠性灵敏度/轻量化Key words
control moment gyro/locking device/response surface/first order second moment/reliability sensitivity/weight reduction分类
航空航天引用本文复制引用
汤继强,赵韶璞,王阔..磁悬浮控制力矩陀螺锁紧机构可靠性设计及优化[J].光学精密工程,2018,26(3):597-605,9.基金项目
国家自然科学基金面上项目(No.61773030,No.61473018) （No.61773030,No.61473018）
国家留学基金资助项目(No.201606025042) （No.201606025042）
